BP

GO:0002576

platelet degranulation

The regulated exocytosis of secretory granules containing preformed mediators such as histamine and serotonin by a platelet.

TAS

BP

GO:0007160

cell-matrix adhesion

The binding of a cell to the extracellular matrix via adhesion molecules.

IDA

BP

GO:0007165

signal transduction

The cellular process in which a signal is conveyed to trigger a change in the activity or state of a cell. Signal transduction begins with reception of a signal (e.g. a ligand binding to a receptor or receptor activation by a stimulus such as light), or for signal transduction in the absence of ligand, signal-withdrawal or the activity of a constitutively active receptor. Signal transduction ends with regulation of a downstream cellular process, e.g. regulation of transcription or regulation of a metabolic process. Signal transduction covers signaling from receptors located on the surface of the cell and signaling via molecules located within the cell. For signaling between cells, signal transduction is restricted to events at and within the receiving cell.

IEA

BP

GO:0007596

blood coagulation

The sequential process in which the multiple coagulation factors of the blood interact, ultimately resulting in the formation of an insoluble fibrin clot; it may be divided into three stages: stage 1, the formation of intrinsic and extrinsic prothrombin converting principle; stage 2, the formation of thrombin; stage 3, the formation of stable fibrin polymers.

TAS

BP

GO:0009306

protein secretion

The controlled release of proteins from a cell.

IMP

BP

GO:0030198

extracellular matrix organization

A process that is carried out at the cellular level which results in the assembly, arrangement of constituent parts, or disassembly of an extracellular matrix.

TAS

BP

GO:0031639

plasminogen activation

The process in which inactive plasminogen is processed to active plasmin. This process includes cleavage at an internal Arg-Val site to form an N-terminal A-chain and C-terminal B-chain held together by a disulfide bond, and can include further proteolytic cleavage events to remove the preactivation peptide.

IDA

BP

GO:0034116

positive regulation of heterotypic cell-cell adhesion

Any process that activates or increases the frequency, rate, or extent of heterotypic cell-cell adhesion.

IDA

BP

GO:0042730

fibrinolysis

A process that solubilizes fibrin in the bloodstream of a multicellular organism, chiefly by the proteolytic action of plasmin.

IDA

BP

GO:0043623

cellular protein complex assembly

The aggregation, arrangement and bonding together of a set of components to form a protein complex, occurring at the level of an individual cell.

IDA

BP

GO:0045907

positive regulation of vasoconstriction

Any process that activates or increases the frequency, rate or extent of vasoconstriction.

IDA

BP

GO:0045921

positive regulation of exocytosis

Any process that activates or increases the frequency, rate or extent of exocytosis.

IDA

BP

GO:0050714

positive regulation of protein secretion

Any process that activates or increases the frequency, rate or extent of the controlled release of a protein from a cell.

IDA

BP

GO:0051258

protein polymerization

The process of creating protein polymers, compounds composed of a large number of component monomers; polymeric proteins may be made up of different or identical monomers. Polymerization occurs by the addition of extra monomers to an existing poly- or oligomeric protein.

IMP

BP

GO:0051592

response to calcium ion

Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a calcium ion stimulus.

IDA

BP

GO:0070374

positive regulation of ERK1 and ERK2 cascade

Any process that activates or increases the frequency, rate or extent of signal transduction mediated by the ERK1 and ERK2 cascade.

IDA

BP

GO:0070527

platelet aggregation

The adhesion of one platelet to one or more other platelets via adhesion molecules.

IDA

BP

GO:0072378

blood coagulation, fibrin clot formation

A protein activation cascade that contributes to blood coagulation and consists of the cascade of enzymatic reactions initiated by physical damage to the wall of a blood vessel, leading to the formation of a formation of a fibrin clot at the site of the injury. The process also includes numerous positive and negative regulatory events.

IDA|IMP

BP

GO:0090277

positive regulation of peptide hormone secretion

Any process that increases the rate, frequency, or extent of the regulated release of a peptide hormone from secretory granules.

IDA

BP

GO:1900026

positive regulation of substrate adhesion-dependent cell spreading

Any process that activates or increases the frequency, rate or extent of substrate adhesion-dependent cell spreading.

NAS

BP

GO:1902042

negative regulation of extrinsic apoptotic signaling pathway via death domain receptors

Any process that stops, prevents or reduces the frequency, rate or extent of extrinsic apoptotic signaling pathway via death domain receptors.

IDA

BP

GO:2000352

negative regulation of endothelial cell apoptotic process

Any process that stops, prevents or reduces the frequency, rate or extent of endothelial cell apoptotic process.

IDA

CC

GO:0005576

extracellular region

The space external to the outermost structure of a cell. For cells without external protective or external encapsulating structures this refers to space outside of the plasma membrane. This term covers the host cell environment outside an intracellular parasite.

TAS

CC

GO:0005577

fibrinogen complex

A highly soluble, elongated protein complex found in blood plasma and involved in clot formation. It is converted into fibrin monomer by the action of thrombin. In the mouse, fibrinogen is a hexamer, 46 nm long and 9 nm maximal diameter, containing two sets of nonidentical chains (alpha, beta, and gamma) linked together by disulfide bonds.

IDA

CC

GO:0005615

extracellular space

That part of a multicellular organism outside the cells proper, usually taken to be outside the plasma membranes, and occupied by fluid.

IDA

CC

GO:0005886

plasma membrane

The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins.

TAS

CC

GO:0005938

cell cortex

The region of a cell that lies just beneath the plasma membrane and often, but not always, contains a network of actin filaments and associated proteins.

IEA

CC

GO:0009897

external side of plasma membrane

The leaflet of the plasma membrane that faces away from the cytoplasm and any proteins embedded or anchored in it or attached to its surface.

IDA

CC

GO:0009986

cell surface

The external part of the cell wall and/or plasma membrane.

IDA

CC

GO:0031091

platelet alpha granule

A secretory organelle found in blood platelets, which is unique in that it exhibits further compartmentalization and acquires its protein content via two distinct mechanisms: (1) biosynthesis predominantly at the megakaryocyte (MK) level (with some vestigial platelet synthesis) (e.g. platelet factor 4) and (2) endocytosis and pinocytosis at both the MK and circulating platelet levels (e.g. fibrinogen (Fg) and IgG).

IDA

CC

GO:0031093

platelet alpha granule lumen

The volume enclosed by the membrane of the platelet alpha granule.

TAS

CC

GO:0070062

extracellular exosome

A membrane-bounded vesicle that is released into the extracellular region by fusion of the limiting endosomal membrane of a multivesicular body with the plasma membrane. Extracellular exosomes, also simply called exosomes, have a diameter of about 40-100 nm.

IDA

CC

GO:0072562

blood microparticle

A phospholipid microvesicle that is derived from any of several cell types, such as platelets, blood cells, endothelial cells, or others, and contains membrane receptors as well as other proteins characteristic of the parental cell. Microparticles are heterogeneous in size, and are characterized as microvesicles free of nucleic acids.

IDA

MF

GO:0005102

receptor binding

Interacting selectively and non-covalently with one or more specific sites on a receptor molecule, a macromolecule that undergoes combination with a hormone, neurotransmitter, drug or intracellular messenger to initiate a change in cell function.

IPI

MF

GO:0005198

structural molecule activity

The action of a molecule that contributes to the structural integrity of a complex or assembly within or outside a cell.

IDA

MF

GO:0005515

protein binding

Interacting selectively and non-covalently with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules).

IPI

MF

GO:0030674

protein binding, bridging

The binding activity of a molecule that brings together two or more protein molecules, or a protein and another macromolecule or complex, through a selective, non-covalent, often stoichiometric interaction, permitting those molecules to function in a coordinated way.

IEA

MF

GO:0046872

metal ion binding

Interacting selectively and non-covalently with any metal ion.

IEA

MF

GO:0050839

cell adhesion molecule binding

Interacting selectively and non-covalently with a cell adhesion molecule.

IPI